The Katsura Frame: A 20-Year Legacy — Interview with the Developer Behind Yamaha’s 2-Stroke YZ
The aluminum frame used in Yamaha’s YZ125 and YZ250 motocross machines is known internally at Yamaha Motor as the “Katsura Frame.”
It was created by Takehisa Katsura — a veteran engineer who developed Yamaha’s factory “YZM” race bikes in the 1990s, later served as a factory team manager in the 20...